From patchwork Sun Mar 6 17:41:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 12770855 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 057FFC433EF for ; Sun, 6 Mar 2022 18:02:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230517AbiCFSDX (ORCPT ); Sun, 6 Mar 2022 13:03:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40592 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232053AbiCFSDW (ORCPT ); Sun, 6 Mar 2022 13:03:22 -0500 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6D453F25 for ; Sun, 6 Mar 2022 10:02:28 -0800 (PST) Received: from fraeml738-chm.china.huawei.com (unknown [172.18.147.226]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4KBTv24zBYz67Klm; Mon, 7 Mar 2022 02:02:06 +0800 (CST) Received: from lhreml710-chm.china.huawei.com (10.201.108.61) by fraeml738-chm.china.huawei.com (10.206.15.219) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Sun, 6 Mar 2022 19:02:26 +0100 Received: from SecurePC-101-06.china.huawei.com (10.122.247.231) by lhreml710-chm.china.huawei.com (10.201.108.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2308.21; Sun, 6 Mar 2022 18:02:25 +0000 From: Jonathan Cameron To: , , =?utf-8?q?Alex_Benn?= =?utf-8?q?=C3=A9e?= , Marcel Apfelbaum , "Michael S . Tsirkin" , Igor Mammedov , Markus Armbruster CC: , Ben Widawsky , "Peter Maydell" , Shameerali Kolothum Thodi , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Saransh Gupta1 , Shreyas Shah , Chris Browy , Samarth Saxena , "Dan Williams" Subject: [PATCH v7 41/46] hw/arm/virt: Basic CXL enablement on pci_expander_bridge instances pxb-cxl Date: Sun, 6 Mar 2022 17:41:32 +0000 Message-ID: <20220306174137.5707-42-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220306174137.5707-1-Jonathan.Cameron@huawei.com> References: <20220306174137.5707-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.122.247.231] X-ClientProxiedBy: lhreml706-chm.china.huawei.com (10.201.108.55) To lhreml710-chm.china.huawei.com (10.201.108.61) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-cxl@vger.kernel.org Code based on i386/pc enablement. The memory layout places space for 16 host bridge register regions after the GIC_REDIST2 in the extended memmap. The CFMWs are placed above the extended memmap. Only create the CEDT table if cxl=on set for the machine. Signed-off-by: Jonathan Cameron Signed-off-by: Ben Widawsky --- hw/arm/virt-acpi-build.c | 33 +++++++++++++++++++++++++++++++++ hw/arm/virt.c | 40 +++++++++++++++++++++++++++++++++++++++- include/hw/arm/virt.h | 1 + 3 files changed, 73 insertions(+), 1 deletion(-) diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c index 449fab0080..86a2f40437 100644 --- a/hw/arm/virt-acpi-build.c +++ b/hw/arm/virt-acpi-build.c @@ -39,9 +39,11 @@ #include "hw/acpi/aml-build.h" #include "hw/acpi/utils.h" #include "hw/acpi/pci.h" +#include "hw/acpi/cxl.h" #include "hw/acpi/memory_hotplug.h" #include "hw/acpi/generic_event_device.h" #include "hw/acpi/tpm.h" +#include "hw/cxl/cxl.h" #include "hw/pci/pcie_host.h" #include "hw/pci/pci.h" #include "hw/pci/pci_bus.h" @@ -157,10 +159,29 @@ static void acpi_dsdt_add_virtio(Aml *scope, } } +/* Uses local definition of AcpiBuildState so can't easily be common code */ +static void build_acpi0017(Aml *table) +{ + Aml *dev, *scope, *method; + + scope = aml_scope("_SB"); + dev = aml_device("CXLM"); + aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0017"))); + + method = aml_method("_STA", 0, AML_NOTSERIALIZED); + aml_append(method, aml_return(aml_int(0x01))); + aml_append(dev, method); + + aml_append(scope, dev); + aml_append(table, scope); +} + static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap, uint32_t irq, VirtMachineState *vms) { int ecam_id = VIRT_ECAM_ID(vms->highmem_ecam); + bool cxl_present = false; + PCIBus *bus = vms->bus; struct GPEXConfig cfg = { .mmio32 = memmap[VIRT_PCIE_MMIO], .pio = memmap[VIRT_PCIE_PIO], @@ -174,6 +195,14 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap, } acpi_dsdt_add_gpex(scope, &cfg); + QLIST_FOREACH(bus, &vms->bus->child, sibling) { + if (pci_bus_is_cxl(bus)) { + cxl_present = true; + } + } + if (cxl_present) { + build_acpi0017(scope); + } } static void acpi_dsdt_add_gpio(Aml *scope, const MemMapEntry *gpio_memmap, @@ -991,6 +1020,10 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables) vms->oem_table_id); } } + if (ms->cxl_devices_state->is_enabled) { + cxl_build_cedt(ms, table_offsets, tables_blob, tables->linker, + vms->oem_id, vms->oem_table_id); + } if (ms->nvdimms_state->is_enabled) { nvdimm_build_acpi(table_offsets, tables_blob, tables->linker, diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 6c0f2ef9c7..31fdebc7c7 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -78,6 +78,7 @@ #include "hw/virtio/virtio-mem-pci.h" #include "hw/virtio/virtio-iommu.h" #include "hw/char/pl011.h" +#include "hw/cxl/cxl.h" #include "qemu/guest-random.h" #define DEFINE_VIRT_MACHINE_LATEST(major, minor, latest) \ @@ -178,6 +179,7 @@ static const MemMapEntry base_memmap[] = { static MemMapEntry extended_memmap[] = { /* Additional 64 MB redist region (can contain up to 512 redistributors) */ [VIRT_HIGH_GIC_REDIST2] = { 0x0, 64 * MiB }, + [VIRT_CXL_HOST] = { 0x0, 64 * KiB * 16 }, /* 16 UID */ [VIRT_HIGH_PCIE_ECAM] = { 0x0, 256 * MiB }, /* Second PCIe window */ [VIRT_HIGH_PCIE_MMIO] = { 0x0, 512 * GiB }, @@ -1508,6 +1510,17 @@ static void create_pcie(VirtMachineState *vms) } } +static void create_cxl_host_reg_region(VirtMachineState *vms) +{ + MemoryRegion *sysmem = get_system_memory(); + MachineState *ms = MACHINE(vms); + MemoryRegion *mr = &ms->cxl_devices_state->host_mr; + + memory_region_init(mr, OBJECT(ms), "cxl_host_reg", + vms->memmap[VIRT_CXL_HOST].size); + memory_region_add_subregion(sysmem, vms->memmap[VIRT_CXL_HOST].base, mr); +} + static void create_platform_bus(VirtMachineState *vms) { DeviceState *dev; @@ -1670,7 +1683,7 @@ static uint64_t virt_cpu_mp_affinity(VirtMachineState *vms, int idx) static void virt_set_memmap(VirtMachineState *vms, int pa_bits) { MachineState *ms = MACHINE(vms); - hwaddr base, device_memory_base, device_memory_size, memtop; + hwaddr base, device_memory_base, device_memory_size, memtop, cxl_fmw_base; int i; vms->memmap = extended_memmap; @@ -1762,6 +1775,20 @@ static void virt_set_memmap(VirtMachineState *vms, int pa_bits) memory_region_init(&ms->device_memory->mr, OBJECT(vms), "device-memory", device_memory_size); } + + if (ms->cxl_devices_state->fixed_windows) { + GList *it; + + cxl_fmw_base = ROUND_UP(base, 256 * MiB); + for (it = ms->cxl_devices_state->fixed_windows; it; it = it->next) { + CXLFixedWindow *fw = it->data; + + fw->base = cxl_fmw_base; + memory_region_init_io(&fw->mr, OBJECT(vms), &cfmws_ops, fw, + "cxl-fixed-memory-region", fw->size); + cxl_fmw_base += fw->size; + } + } } /* @@ -2164,6 +2191,15 @@ static void machvirt_init(MachineState *machine) memory_region_add_subregion(sysmem, machine->device_memory->base, &machine->device_memory->mr); } + if (machine->cxl_devices_state->fixed_windows) { + GList *it; + for (it = machine->cxl_devices_state->fixed_windows; it; + it = it->next) { + CXLFixedWindow *fw = it->data; + + memory_region_add_subregion(sysmem, fw->base, &fw->mr); + } + } virt_flash_fdt(vms, sysmem, secure_sysmem ?: sysmem); @@ -2190,6 +2226,7 @@ static void machvirt_init(MachineState *machine) create_rtc(vms); create_pcie(vms); + create_cxl_host_reg_region(vms); if (has_ged && aarch64 && firmware_loaded && virt_is_acpi_enabled(vms)) { vms->acpi_dev = create_acpi_ged(vms); @@ -2845,6 +2882,7 @@ static void virt_machine_class_init(ObjectClass *oc, void *data) hc->unplug = virt_machine_device_unplug_cb; mc->nvdimm_supported = true; mc->smp_props.clusters_supported = true; + mc->cxl_supported = true; mc->auto_enable_numa_with_memhp = true; mc->auto_enable_numa_with_memdev = true; mc->default_ram_id = "mach-virt.ram"; diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h index c1ea17d0de..097e1f0c36 100644 --- a/include/hw/arm/virt.h +++ b/include/hw/arm/virt.h @@ -92,6 +92,7 @@ enum { /* indices of IO regions located after the RAM */ enum { VIRT_HIGH_GIC_REDIST2 = VIRT_LOWMEMMAP_LAST, + VIRT_CXL_HOST, VIRT_HIGH_PCIE_ECAM, VIRT_HIGH_PCIE_MMIO, };